Improvement in pumps



J'. W. DOUGLAS. PUMP.

No. 38,444. 4 Patented May 5, 1863.

UNITED STATES PATENT OFFICE.

JOSEPH W. DOUGLAS, OF MIDDLETOWN, CONNECTICUT, ASSlGNOR TO W. &

v B. DOUGLAS, OF SAME PLACE.

IMPROVEM ENT IN PUMPS.

Specification forming part of'Lett'ers Patent No. 38,444, dated May 5, 1863i To aZZ whom it may concern.-

Be it known that l, JOSEPH W. DOUGLAS, of Middletown, in the county of Middlesex and State of Connecticut, have invented a new and useful Improvement in Pumps; and Iv do hereby declare that the following is'a full, clear, and exact description of I the same, reference being had to the accompanying drawings, making a 'part of this specification in which- Figure 1 is a side view of a portion of a pump having my invention applied to it; Fig. 2, a transverse vertical section of the same, taken in line a: w, Fig.1 Fig. 3, a detached inner side view of the cap which covers the valves 5 Fig. 4, a detached face view of the valves.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to an improvement in force-pumps; and it cons ts in a 'novel arrangement of the valves and valve-box, as hereinafter fully shown and described, whereby all the valves may be rendered accessible by the removal of one nut only.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a base, on which 'two pumpcylinders are secured, a a being the sockets into which they are screwed,and B represents a water-passage in said base, which passage at its upper end communicates with an airchamber resting on a flange, 121

C represents a valve-box, which commum cates with the passage B of the 'air'chamber and also with thesuction-passage D and the two pump-cylinders. The orifices of all these passages are shown in Fig. 1,0 0 being the passages whichlead to the pump-cylinders.

B is the air-chamber passage, and d d the suction-passages. The suction-passage, it will be seen, has two orifices, and also each pumpcylinder passage, said passages being divaricated or forked.

The'orifices shown in Fig.1 are in an inclined plate, which forms the valve-seat, the valve-box being formed by a cap, E, which covers the valve-seat, and is provided internally with partitions e e f. (See Fig. 3.) These partitions divide the valve-box into three compartments, 9 g h. The compartment 71. extends the whole length of the valve-box and communicates with the upper orifices, c, of both pump-cylinder passages, and also with the air-chamber passage B. The other compartments, g g, communicate each with a lower orifice, c, of a pump-cylinder passage and with one of the suction-orifices d.

F is a bolt, which passes through a pier, e, in the suction-passage aud'through the center of the cap E. This cap has a pendent flange or lip, i, at each end of it, and these flanges or .lips project down at each side of the valveseat.v When the cap is fitted on its seat the former will be prevented from turning out of a proper position.

The valves are all out in a single piece of leather, G. (See Fig. 4.).

jij represent the valves which cover 'the upper orifices, c, of the pump cylinder passages, and k k the lower valves, which cover the suction-orifices d d, the lower orifices, c c, of the pump-cylinder passages being always open, as well as the orifice of the air-chamber passage B. The valves all havemetal plates attached to them, and the leather G is retained in proper position by the cap E, which presses upon it when secured in position bya nut, H, on the upper end of the bolt F, the leather serving as a packing for the valve-box.

The operation of the pump will be readily,-

seen. When a suction is formed in one cylinder bythe rising of its piston, the water raises the valve is, which covers the suction-orifice (1 within the compartment 9, which communicates with said cylinder, and the latter is filled with water below the piston, and the piston of the other cylinder, meanwhile descending, forces the water previously drawn up'within it through the valve j, over its upper suctionorifice, and thence through the passage B into the air-chamber and out through theeduction: pipe communicating therewith. The two pistons thus alternately draw up the water into.

their respective cylinders and force it into the air-chamber and out through the eductionplpew It will be seen from the above description that the valves are rendered very accessible all that is required to expose the valves being simply to remove the nut H. The valves, therefore, of the pump may be repaired or replaced by new ones with the greatest facility,

and the pump always kept; in perfect working ranged with a cap, E, and a single screw-bolt, order. F, passing through a pier, e, substantially as Having ohus described my invention, what shown and described. I claim as new, and desire to secure by Letters Patent, is-

Thevalves j j k To, all placed on one and the same plate, when used in combination and ar- J 08. W. DOUGLAS.

Witnesses: I

JOHN M. DOUGLAS,

IRA GARDINER- 

